Select all sentences that avoid double marking in the negative verb phrase.
This folder doesn't contain invoices.✓Respuesta correcta
The guard cannot enters the vault.
We did not reset the router.✓Respuesta correcta
Paula has not finished the audit.✓Respuesta correcta
Explicación
The acceptable forms put grammatical marking on one auxiliary and leave the following lexical verb in the required base or participle form. The malformed modal sentence adds a third-person ending after can.